E38, E39, E46, X5:
BM53 with 4:3 small screen Board Monitor
1. Turn the radio on.
2. Press and hold the "RDS' button for at least 8 seconds.
3. Scroll through the functions using the "< >" buttons.
4. Turn the radio off to leave the service mode.


E38, E39, E46, X5:
BM53 with 16:9 Widescreen Monitor PRIOR to 9/01
1. Turn the radio on.
2. Within 8 seconds, press the 'INFO' button.
3. From the Info screen, select RDS (choose PTY on E38).
4. Press and hold the BM control knob (right side knob) for at least 8 seconds.
5. Scroll through functions using the station search buttons "< >".
6. Turn the radio off to leave the service mode.

E38, E39, E46, X5:
BM53 with Widescreen Monitor AFTER 9/01
1. Turn the radio on.
2. Immediately press and hold the 'Select' button for at least 8 seconds. The screen will switch to Service Mode.
3. The screen will now show the serial number of the radio.
4. Use the "< >" buttons to select the desired service function.
5. Selections for the desired service function can be made by using the radio station preset buttons #1-6.
6. Turn the radio off to leave the service mode.